Machine for forming brass spring strips for radiators



ca. H. LOBER MACHINE FOR FORMING BRASS SPRLNG STRIPS FOR RADIATORS FiledApril 8, 1921 Y 2 SheeLs-Shgt 1 4% INV NTUR- Oct. 14. 1924. $1,511,349

- e. H. LOBER MACHINE FOR FORMING BRASS SPRING STRIPS FOR RADIATORSFiled April 8, 1921 2 Sheets-Sheet 2 Patented Get. 14, 1924.

UNITED STATES GEORGE H. LOBER, F TOLEDO, OHIO.

MACHINE FOR, FORMING BRASS Application filed April 8,

To all whom it may concern:

Be it known that- I, GEORGE H. LoBER, a citizen of the United States,and a resident of Toledo, in the county of Lucas and State of Ohio, havemade an Invention Appertaining to Machine for Forming Brass SpringStrips for Radiators; and I do hereby declare the following to be afull, clear, and eXact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompany ing drawings and to thecharacters of reference marked thereon, which form a part of thisspecification.

My invention has for its object to provide an eflicient machine forforming springs from strips of spring brass whereby transversecorrugations may be successively formed and also whereby the strips maybe cutat the proper lengths suitable for as sembling in a radiator.

The invention may be contained in structures of different forms. Toillustrate a practical application of the invention I have selected astructure containing the invention and shall describe it hereinafter.The

structure selected is illustrated in the accompanying drawings.

Fig. 1 of the drawings illustrates a front view of the machine selectedfor purposes of illustration. Fig. 2 illustrates a part of the brassstrip operated upon by the machine. Fi 3 is an end view of a portion ofthe maciine. Fig. 4 illustrates a pair of feeding rolls and shows asection taken on the line 44 indicated in Fig. 1. Fig. 5 illustrates asectional view taken on the line 55 indicated in Fig. 4. Fig. 6 shows aside view of a part of the mechanism illustrated in Fig 4.

In the figures, 1 is the supporting framework of the machine. Themachine may be driven by a drive pulley 2 which operates the crank shaft3 supported in the frame 1. A ram 4 is connected to the crank shaft 3.Dies 5 and 6 are connected to the ram 4 and coact with the die 7 toshape the strips of brass 8 that are. fed to the machine from the spools9. The spools 9 are supported on the bracket 10 secured to the frame 1of the machine.

The dies 5, 6 and 7 have transverse corrugations conforming to the shapeinto which the strips 8 are to be formed. The die 5 is connected to theram 4 by means of SPRING STRIPS FOR RADIATORS.

1921.. Serial No. 459,766.

rods 11 that are loosely mounted in the ram 4 to permit a certain amountof free movement of the die 5 relative to the ram 4. The die 5 isyieldingly held away from the ram 4 by means of springs 12 locatedbetween the die 5 and the ram 4. The strips 8 are fed across the dies 5,6 and 7 and the corrugations are formed by the operation of the die 6coacting with a portion of the die 7. As the strips are further fedabove the die 7 the die 5 operates to position the previously formedcorrugations with reference to the corrugation that is about to beformed by the die 6. The springs 12 force the previously formedcorrugations into certain of the corrugations of the die 7 previous toforming the succeeding corrugations, by the operation of the die 6,since the spring 12 will force the die 5 against the formed portion ofthe strip and thus force the corrugated portion of the strip into thecorrugations of the die 7. The springs 12 operate to hold the strips 8in posit-ion while the ram 4 is moving down and causes the die 6 to formthe additional corrugation or ad ditional corrugations in the strips 8'.When the dies 5 and 6 are lifted the strips are again fed forward intothe machine.

The strips are fed into the machine by means of the rollers 13 and 14that are connected together by the cog wheels 15. The rollers areoperated by a ratchet 16 and a dog 17. of the roller 13 while the dog 17is located on the arm 18 that is oscillated by the link 19 which isconnected to the arm 18 and is also connected to the crank shaft 3 bymeans of the bell crank lever and the link 26. The rollers 13 and 14 arethus operated in unison with the operations of the ram 4 and they moveto feed the strips 8 into the machine when the ram 4 is lifted. Thelength of the strips 8 that are thus fed successively into the machinemay be varied according to the position of the pivot point ofconnectionbetween the head 20 on the crank shaft 3 and the end of thelink 26. The head 20 may be provided with a slot and'a pair ofoverhanging plates 21, and a lug 22 may be adjustably secured inposition in the head 20 by means of the bolt 23. The link 26 is pivotedto the lug 22 and is also pivoted on the bolt 23 whereby the head 20 mayrotate relative to the link 19 and the link 26 may perform transverseoscillatory movement to conform to the The ratchet 16 is connected tothe shaft movements of the arm located on thebell crank lever 25. Alsothe extent ofJeach of the step by step movements of the rollers 13 and14 may be varied according to the adjustment of the link 19 relative tothe arm 27 located on the bell crank lever 25, The extent of the step bystep movements where a single corrugation is formed bythe diev thatsupportsthe rollers 13 and 14 on the The lower roller 14 issupportframe 1. edin bearing blocks 30 that are raised'by the operationof the-springs -3l so as to press the 'r0llerl4 against'the roller 13.The sides of the frame 29 are provided with rods 50 that extend throughholes formed in the sides of the frame and so as to press against thetops of the blocks 30. pushed down by the plate that forms a part of thelever 28, when the lever 28 is pushed down by the operation of the ram 4which strikes the head ofthe adjustable screw 33. When, therefore, theram has reached a certain position in its downward movement, the lever28 is forced down which pushes the blocks 30 down against the tension ofthe compression springs 31 and thus the roller 14 is lowered to releasethe strips 8 which permits the die 6 to draw the strips forward into themachine. v

The strips are severed when sufficient lengths of the corrugations havebeen formed by means of the plunger 34 which is also operatedby the bellcrank lever'25. The time of the operation of the plunger 34 isautomatically controlled by the machine and 'so that the plunger 34 isoperated aftera predetermined number-of corrugations have been formed. Alink 35 is connected toithe bell crank lever and to an arm '36 that is."provided with a dog 37 that operates upon the ratchet 38 insubstantially the same mannerthat the ratchet 16 is operated upon bythe-dog 17; The ratchet 38 is pivotally supported on" the-frame l forrotative movements and as the bell crank lever 25 is operated by theadjustable link 26 the ratchet 38 is rotated The ratchet38 is providedWitlra camsurface 39,-w hich operatesnpon theend of an arm of the bellcranklever40 when the cam 39nreaches certain point in its rotation;Thebell crank the dotted lines 4 The rods 5 0 are lever. 40 is pivotedon the frame 1 and operates to draw a sliding rod 41 that issupenacting, with an opening 46 formed in the table of the machine, severs the strips 8. This is performed when the plunger is operatingthrough the die 6 to form corrugation, ,The plunger 34 and thecooperating opening 46 is preferably'so shaped as to cut out pieces ofthestrips located'between 7 indicated in Fig. 2. Therefore the edges ofthe plunger-34 coact with both side edges of theopening 46 to remove-theportions of the strips between, the dotted lines 47. I

, I claim: Y

1. In a machine for forming strips, a stationary die, a ram,a pair ofdies connected to the ram, one of the dies movable relative to the ram,compression springs lore intermediate the movable die and the end of theram forpositioning the strips relative to the stationary die and forbolding the strips whilethe other die connected tothe ram co-acts withthe stationary die to shape the sheet material, a pair of rollersfeeding the strips over the stationary ,die, and means operated by theram for releasing the rollers from the strips .2; inamachine for formingstrips, a stationary die, a rain, a pair of diesconnected to the ram,one of the dies movable relative to the ram, compression springs locatedinthe ram for positioning the strips relative to the stationary dieand 1forholding the strips while vthe other die connected 'tothe ram co-actswith the stationary die to shape of operations of the-ram. in testimonywhereof I have hereunto signed my name- :to this specification;

GEORGE H. Lor ne,

lUU

tern' ediate the movable die and the end of

